Investec Asset Management's Bradley George is leaving his role as head of commodities and resources to take up a senior position with the group in the US.
Commodity markets have divided African nations in to two blocks; the importers and the exporters.
Guinness founder and CIO Tim Guinness has said the problems in Greece will not spark a fresh banking crisis even if the beleaguered nation is forced to exit the euro.
Royal Dutch Shell is planning to slash its spending by $15bn over the next three years, following a collapse in the oil price.
The Kijani Commodity fund has moved its domicile to target UK and European investors after a year in which it returned more than 20%.
Oil prices could plummet even lower to $30 a barrel, according to Goldman Sachs president Gary Cohn.
The after-effects of the oil shock
The price of Brent crude oil has moved back above $49 a barrel following the death of Saudi Arabia's ruler King Abdullah overnight.
BP group chief executive Bob Dudley is expecting oil to remain at current low levels for up to three years, leading to job losses and falling investment in the oil sector.